From: Konstantin Khlebnikov <khlebnikov@openvz.org>
Date: Wed, 21 Mar 2012 23:33:48 +0000 (-0700)
Subject: mm: add rss counters consistency check
X-Git-Tag: v3.4-rc1~158^2~78
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3f0327f8e9d7a503f0d64573c311eddd61f197d;p=pandora-kernel.git

mm: add rss counters consistency check

Warn about non-zero rss counters at final mmdrop.

This check will prevent reoccurences of bugs such as that fixed in "mm:
fix rss count leakage during migration".

I didn't hide this check under CONFIG_VM_DEBUG because it rather small and
rss counters cover whole page-table management, so this is a good
invariant.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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